Reversing mechanism



Patented Apr. 25, I899.

6. S. GILMAN. BEVERSJNG MECHANISM.

(Application filed Sept, 16, 1898.)

3 Sheets-Sheet I.

(No Model.)

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nmumou \NASHINGTON u c No. 623,898. Patented Apr. 25,1899.

. a. s. GILMAN.

BEVERSING MECHANISM.

(Application filed Sept. 16, 1898.)

3 Sheets-Sheet 2.

(No Model.)

INVENTOR I BY %Ld A'rromvcy we moms P'ETEFIS cc moTmuTuo. wnsnmewn, n.c.

No. 623,398. Patented Apr. 25, I899. a. s. GILMAN. REVERSING MECHANISM.(Applicatipri filed de t. 16, 1898.

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(No Model INVENTOR BY Mow ATTORNEY.

FFICE.

GEORGE S. GILMAN, OF LOWELL, MASSACHUSETTS.

REVERSING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 623,898, dated April25, 1899.

Application filed September 16, 1898. Serial No. 691,296.

To (LZZ whom it may concern.-

Be it known that I, GEORGE S. GILMAN, a citizen of the United States,and a resident of Lowell, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inReversing Mechanism for Shafting, of which the following is aspecification.

My invention relates to reversing mechanism for shafting, the principalobject of the same being to do away with belts and pulleys and to enablethe shaft to be run in one direction at a greater speed than in theother for the purpose of, saving time in operating machines which arerun in one direction during their effective movement but require to beturned in the opposite direction after each operation to restore them toposition for the next operation, as engine-lathes.

Said invention consists in the devices and combinations hereinafterdescribed and claimed.

In the accompanying drawings, on three sheets, Figure 1 is a plan,partly in central horizontal section, of a counter-shaft, a bandpulleyloose thereon, and other parts which form my improved clutch; Fig. 2,afront elevation of the same, showing also shaft-hangers and acone-pulley on the shaft; Fig. 3, an outside or left side elevation ofthe inner clamp-piece; Fig. 4, a horizontal section on the line 4 4 inFig. 3; Fig. 5, an elevation of either side of either of theclamp-levers; Fig. 6, an outer or right side elevation of thedriving-pulley and the friction-clutch devices and the supporting meansor hanger which supports said devices; Fig. 7, an outer or left sideelevation of the clutch shown at the left of the driving-pulley in Fig.1 and said pulley.

It will be understood that the words right and left are usedhereinbefore and hereinafter only with reference to the positionsrelatively to the band-pulley the other parts are represented asoccupying in Figs. 1 and 2.

A represents in Figs. 1 and 2 a counter-shaft supported in suitablehangers a a, secured to the overhead timbers B or otherwise in any usualmanner. The counter-shaft A is driven by a pulley (J, loose on saidcounter-shaft, but causing said counter-shaft to rotate therewith by theclutch mechanism hereinafter described. The pulley O is drivencontinuously (No model.)

in the same direction in the usual manner by a belt from a main shaft.(Not shown.)

The shaft A is represented as having fast thereon a cone-pulley (R, fromwhich a belt may run to the corresponding cone-pulley of a lathe orother machine to drive the same. A shifting lever D is f ulcrumedoverhead at d on a suitable support d, and between its ends is pivotedat d to a shifting rod (2 to which are rigidly secured two forks (Z 01the ends of which farthest from said rod 01 engage grooves e c in thesleeves E E, respecti vely. The sleeve E preferably rotates with theshaft A, being splined thereto at e*, and is provided at its inner endwith an enlarged head a.

An inner clamp-piece F, having arms f f secured to or integral with ahub f? f, rotates with the shaft A, said hub for convenience of removaland replacement being divided diametrically between said arms f f, andthe halves f f of said hub having ears f f secured to each other bybolts f f, as shown in Figs. 3, 4, and 7. The shaft is caused to rotatewith the clamp-piece F by the spline 6 above mentioned, which enters akey-seat f in the hub of said clamp-piece.

Two clamp-levers G G, Figs. 1, 3, 4, 5, and 7, are fulcrumed in ears f fon the outer face of the clamp-piece F on opposite sides of the hub,their free ends resting on opposite sides of the sleeve E between thegroove (2 and the enlargement a, so that when said sleeve E is movedaway from the pulley C said free ends are thrown outward. The 1evers G Gare each provided with a pair of lateral wings g g, the edges g g ofwhich farthest from the piece F are beveled, as shown in Figs. 1, 4, and5.

The outer clamps H H are loosely secured to the clamp-piece F by bolts II and nuts M. passing through said clamps and the arms ff of said pieceF, near the outer ends of the same, and the expansion of the springs 2'i surrounding said bolts and compressed between said clamps andclamp-piece, tends to separate the outer ends of said clamps andclamp-piece and to hold them out of contact with an internal annularflange c, with which the rim of the pulley G is provided. The inner endsof the clamps H H rest on the beveled edges 9 g of the levers G G andare themselves correspondingly beveled at h h, as shown in Fig. 1, andare slotted at 7L2 7r to receive loosely the bodies of said levers, asshown in Fig. 7, so that when the sleeve E is moved away from the pulleythe enlargement e" throws the free ends of the levers G G farther awayfrom the shaft, causing the inner ends of the clamps H H to move awayfrom the clamp-piece F and their outer ends to approach the outer endsof the arms ff of said clamp-piece and to grasp the flange 0, thuscompelling the shaft A to rotate with the pulley O, the nuts i i servingas fnlcrums for said clamp-pieces. The piece F may be made of cast-ironand yet spring enough to be drawn against the inner face of the flange 0when drawn by the leverage of the clamp II II when the latter arepressed against the outer face of said flange o and strain the bolts II, as said clamp-piece and clamps are in close proximity to said flangewhen not in contact therewith. When the sleeve E is again moved to theright in Fig. l, the free ends of the levers G G are caused to approacheach other by the springs 75 2' which push the clamps away from theclamp-piece F and release the flange c of the drivingpulley. If in thusmoving the sleeve E to the right the shifting lever D is swung farenough, the motion of the shaft A will be reversed by other clutchdevices operated by the movement of the sleeve E, above mentioned.

The sleeve E slides freely on a hubj, surrounding the shaft Aand securedto or integral with a hanger J, Figs. 1, 2, and 6, said hanger beingsupported in substantially the same manner as the shaft-hangers a a areor may be supported. In suitable bearings j j supported in the hanger Jon opposite sides of the shaft A and at equal distances from said shaft,slide spindles k, on which turn loosely cone-rolls K K, arranged betweensaid hanger J and the pulley C and each prevented from moving endwise onits spindle by a collar or shoulder k on said spindle and by the head ofa bolt k driven into the end of said spindle. A flanged disk L, splinedto the shaft A at l, is arranged between the hanger J and the pulley Oand is offset into the annular space around the hub, as shown in Fig. 1,so that the rim of said flanged disk L lies within the rim of said disk0. The outer face of the pulley L and the inner surface of the rim ofthe pulley O are oppositely beveled at Z and c at such an angle as tofit the faces of the cone-rolls K K when the lattcr are pushed into thespace between said bevels Z c, and thus to rotate the said disk L andshaft A in the opposite direction from that of the pulley C. Thecone-rolls are normall y held out of engagement with the pulley O anddisk L by springs (represented as spiral springs 76 k surrounding thespindles 70 7t and compressed between the outer ends of the bearings 7'and collars 7t 7t", fixed on said spindles.

The outer ends of levers M M, fulcrumed between their ends at m m 011studs m m enter transverse grooves 7.37 k in the spindles 7.; 70, whiletheir inner ends rest upon the 0pposite sides of the sleeve E and arespread apart by the enlargement e on said sleeve E, passing between themas said sleeve is moved to the right, throwing the outer ends of saidlevers toward the hanger J and forcing the cone-rolls K K intoengagement, as above described.

The studs m m are adj ustable in the hanger J by means of nuts m m,turning on threaded portions of said studs on opposite sides of saidhanger to enable the levers M M to be properly adjusted to throw both ofthe rolls K K simultaneously into and out of engagement.

By properly moving the shifting lever D the band-pulley C will be out ofengagement with both clutching devices and may rotate without turningthe shaft A.

I claim as my invention 1. The combination of a shaft, a pulley, loosethereon and having a rim, a stationary hanger, provided with a hub,loosely surrounding said shaft, a disk, fast on said shaft and having arim, arranged within the rim of said pulley, the inner face of saidfirst-named rim and the outer face of the other rim being beveledequally in opposite directions, spindles, arranged to slide in saidhanger, intermediate cone-rolls, loose on said spindles but movablelongitudinally therewith, levers, engaging said spindles, and a sleeve,having an enlargement and movable on said hub, to 0perate said leversand push said rolls into engagement with said pulley and disk.

2. The combination of a shaft, a pulley, loose thereon and having arim,ahanger, provided with a hub, surrounding said shaft, a disk, fast onsaid shaft and having a rim, arranged within the rim of said pulley, theinner face of said first-named rim and the outer face of the other rimbeing beveled equally in opposite directions, spindles, arranged toslide in said hanger, intermediate cone-rolls, loose on said spindlesbut movable longitudinally therewith, levers, engaging said spindles, asleeve, having an enlargement and movable on said hub, to operate saidlevers and push said cones into engagement with said rims, and springs,to draw said cones out of such engagement.

3. The combination of a shaft, a pulley,

loose thereon, a clutch, rotary with said shaft,

and adapted to be engaged with and disengaged from said pulley and tocause said shaft to rotate in the same direction with said pulley, adisk, fast on said shaft, and intermediate friction-cones, each adaptedto be moved endwise to be engaged with and disengaged from said pulleyand disk, to cause said shaft to rotate in the opposite direction fromthat of said pulley, the axes of said cones bein g at all times parallelwith said shaft.

4. The combination of a shaft, a pulley,

loose thereon and having a rim, a hanger, a disk, fast on said shaft andhaving a rim, arranged within the rim of said pulley, the inner face ofsaid first-named rim and the outer face of the other rim being beveledequallyin opposite directions, spindles, arranged to slide in saidhanger, intermediate cone-rolls, loose on said spindles but movablelongitudinally therewith, fulcrum-studs, adjustably secured in saidhanger, levers, pivoted on said studs and engaging said spindles, asleeve, having an enlargement and movable longitudinally to operate saidlevers and push said cones into engagement with said rims, and springs,to draw said cones out of such engagement.

5. The combination of the shaft, a pulley, loose thereon and havingarim, provided with a flange, a clamp-piece, rotary with said shaft andhaving arms, the outer ends of which are arranged on the inner side ofsaid flange, clamp-levers, fulcrumed on said clamp-piece, outer clamps,loosely connected to said arms and at their outer ends extending on theopposite side of said flange, from said arms, the inner ends of saidclamp-pieces being beveled and resting on beveled surfaces with whichsaid levers are provided, and a sleeve, sur rounding said shaft betweenthe free end of said levers and movable longitudinally on said shaft, torock said levers.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

GEORGE S. GILMAN.

Witnesses:

ALBERT M. MooRE, DENNIS J. MURPHY.

